1. Each branching point represents a point in evolutionary
history where an ancestral
evolutionary lineage gave rise to
a new lineage. The most recent
common ancestor shared by all
lineages in this cladogram is
represented by the number
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The most
recent common ancestor shared
only by gymnosperms and
angiosperms is represented by
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During sunny hours, a large amount of build up between the hours of 1: 00-5: 00 pm. a. ozone b. mercury c. lead d. sulfuric acid

Match the following terms describing electrical events with the correct phases of the cardiac cycle. the ventricular muscle cells depolarize at the start of this phase. during this phase, na+ entry through the funny channels causes the pacemaker potential of sa nodal cells to gradually become less negative until it reaches threshold. the ventricular muscle cells repolarize right before this phase. the cytosolic concentration of calcium in the contractile cells of the ventricle is highest during this phase. a. isovolumetric relaxation b. ventricular ejection c. isovolumetric contraction d. ventricular filling

All individuals have two alleles for a given trait. according to mendel's these alleles are passed down one each from both mother and father.